.at-wrap {
    width: 100%;
    height: 50vw;
    margin: 0 auto;
    border: 1px solid rgba(0, 0, 0, 0.12);
    display: flex;
    flex-direction: column;
    // overflow: hidden;
    position: relative;
  }
  .at-content {
    position: relative;
    overflow: hidden;
    flex: 1 1 auto;
  }

  /** Sidebar **/
  .at-sidebar {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    max-width: 70px;
    width: auto;
    display: flex;
    align-content: stretch;
    z-index: 1001;
    overflow: hidden;
    border-right: 1px solid rgba(0, 0, 0, 0.12);
    background: #f7f7f7;
  }

  .at-sidebar:hover {
    max-width: 400px;
    transition: max-width 0.2s;
    overflow-y: auto;
  }

  .at-viewport {
    overflow-y: auto;
    position: absolute;
    top: 0;
    left: 70px;
    right: 0;
    bottom: 0;
    padding-right: 20px;
  }

  .at-footer {
    flex: 0 0 auto;
    background: #436d9d;
    color: #fff;
  }

  /** Overlay **/

  .at-overlay {
    /** Fill Parent */
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1002;

    /* Blurry dark shade */
    backdrop-filter: blur(3px);
    background: rgba(0, 0, 0, 0.5);

    /** center content */
    display: flex;
    justify-content: center;
    align-items: flex-start;
  }

  .at-overlay-content {
    /* white box with drop-shadow */
    margin-top: 20px;
    background: #fff;
    box-shadow: 0px 5px 10px 0px rgba(0, 0, 0, 0.3);
    padding: 10px;
  }

  /** Track selector **/
  .at-track {
    display: flex;
    position: relative;
    padding: 5px;
    transition: background 0.2s;
    cursor: pointer;
  }

  .at-track:hover {
    background: rgba(0, 0, 0, 0.1);
  }

  .at-track>.at-track-icon,
  .at-track>.at-track-details {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .at-track>.at-track-icon {
    flex-shrink: 0;
    font-size: 32px;
    opacity: 0.5;
    transition: opacity 0.2s;
    width: 64px;
    height: 64px;
    margin-right: 5px;
    align-items: center;
  }

  .at-track-name {
    font-weight: bold;
    margin-bottom: 5px;
  }

  .at-track:hover>.at-track-icon {
    opacity: 0.8;
  }

  .at-track.active {
    background: rgba(0, 0, 0, 0.03);
  }

  .at-track.active>.at-track-icon {
    color: #4972a1;
    opacity: 1;
  }

  .at-track>.at-track-name {
    font-weight: 500;
  }

  /** Footer **/
  .at-controls {
    flex: 0 0 auto;
    display: flex;
    justify-content: space-between;
    background: #436d9d;
    color: #fff;
  }

  .at-controls>div {
    display: flex;
    justify-content: flex-start;
    align-content: center;
    align-items: center;
  }

  .at-controls>div>* {
    display: flex;
    text-align: center;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    padding: 4px;
    margin: 0 3px;
  }

  .at-controls .btn {
    color: #fff;
    border-radius: 0;
    height: 40px;
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  .at-controls .btn.disabled {
    cursor: progress;
    opacity: 0.5;
  }

  .at-controls a.active {
    background: #5588c7;
    text-decoration: none;
  }

  .at-controls .btn i {
    vertical-align: top;
  }

  .at-controls select {
    -moz-appearance: none;
    -webkit-appearance: none;
    appearance: none;
    border: none;
    width: 100%;
    height: 40px;
    background: #436d9d;
    padding: 4px 10px;
    color: #fff;
    font-size: 16px;
    text-align-last: center;
    text-align: center;
    -ms-text-align-last: center;
    -moz-text-align-last: center;
    cursor: pointer;
  }

  .at-song-title {
    font-weight: bold;
  }

  .at-cursor-bar {
    /* Defines the color of the bar background when a bar is played */
    background: rgba(255, 242, 0, 0.25);
  }

  .at-selection div {
    /* Defines the color of the selection background */
    background: rgba(64, 64, 255, 0.1);
  }

  .at-cursor-beat {
    /* Defines the beat cursor */
    background: rgba(64, 64, 255, 0.75);
    width: 3px;
  }

  .at-highlight * {
    /* Defines the color of the music symbols when they are being played (svg) */
    fill: #0078ff;
    stroke: #0078ff;
  }